DST 2007 – Hurry up the clock is ticking!

So this is it!  You have this weekend as an outage window before the brown stuff hits the fan.  So I have been around the blogoshpere and the web and here are a list of resources that you might find handy this weekend.  Oh by the way, if you are leaving it to this weekend .. WHY you could have done it all last weekend?!

So this is all the stuff I have blogged about so far: http://blogs.flaphead.dns2go.com/archive/tags/DST2007/default.aspx

On August 8, 2005, President George W. Bush signed the Energy Policy Act of 2005. This Act changed the time change dates for Daylight Saving Time in the U.S. Beginning in 2007, DST will begin on the second Sunday in March and end the first Sunday in November. The Secretary of Energy will report the impact of this change to Congress.

… and this is the BEST BIT: Congress retains the right to resume the 2005 Daylight Saving Time schedule once the Department of Energy study is complete.

Essentially, you need to apply a patch to every windows desktop or server to take into account the change in DST

The main Microsoft Resource is there: http://support.microsoft.com/gp/cp_dst  This is a really good site, and has a kind of wizard where you can select your OS and Applications.  It will then list out what fixes you need to apply … really cool!

If you are using Microsoft Exchange, then you need to apply a CDO patch and run the rebais tool against users that in the affected locations.  So The 2007 daylight saving time implementation is as follows: Clocks change at 02:00 A.M. local time.

On March 11, 2007, clocks will move forward one hour from 01:59 A.M. to 03:00 A.M. On November 4, 2007, clocks will move back one hour from 01:59 A.M. to 01:00 A.M.

This change affects the following time zones:

GMT-3:30 Newfoundland
GMT-4 Atlantic
GMT-5 Eastern US
GMT-6 Central US
GMT-7 Mountain US
GMT-8 Pacific US
GMT-9 Alaska

So apply the OS fix and the your Exchange Fix.  For Exchange 2003 with SP2, go here http://support.microsoft.com/kb/926666/en-us for the CDO fix.  You have other flavours of Exchange, check out the Microsoft Resource above.

After you install the DST updates for Microsoft Windows, all old appointments that occur during the DST change periods will be incorrectly displayed as occurring one hour later. This is true for both recurring and single-instance appointments. These appointments must be updated so that they will be displayed correctly in Outlook, in Outlook Web Access, and in CDO-based applications.

Now you need to run the rebais tool.  So it comes in two flavours, Client and Server.  The client tool and be set to run against a users mailbox when the log in, or manually by the user.  The Server tool, uses the client tool, but allows an administrator to make the changes (this is generally the best option)

So you can download the outlook tool from here: http://support.microsoft.com/kb/931667/en-us and the server tool from here: http://support.microsoft.com/kb/930879/en-us

I hope this helps!

Other Resources:
Bharat has some excellent resources on his Exchange Blog here: http://exchangepedia.com/blog/2007/03/dst-2007-rollup-post.html

RIM/Blackberry: http://blogs.flaphead.dns2go.com/archive/2007/01/22/us-daylight-saving-time-changes-and-blackberry.aspx

Lotus/ IBM: http://blogs.flaphead.dns2go.com/archive/2007/01/23/lotus-software-daylight-saving-time-dst-changes-for-2007-will-affect-lotus-software-products.aspx

Symantec: Symantec enterprise products and daylight saving time

Am i am sure you can google for others: http://www.google.ie/search?hl=en&q=dst+2007&meta=


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Meetings are moved back one hour in an Exchange 2003 organization

Don’t panic, its not related to DST2007

Source: http://support.microsoft.com/default.aspx?scid=kb;en-us;931222

Meetings are moved back one hour in an Exchange 2003 organization if the meetings are scheduled between September 16, 2006, and October 7, 2006

This problem occurs because the old algorithm for the Jerusalem (GMT + 02:00) time zone sets the standard time to the first Sunday in October. Israel daylight saving time and standard time transitions changed for the year 2006. A new algorithm is being used that has the following rules:

  • Move to daylight saving time at 2:00 A.M. on the last Friday before April 2.
  • Move to standard time at 2:00 A.M. on the Sunday before the tenth day of the Jewish month of Tishrei.

Note The decision to move back to standard time according to the Jewish calendar makes sure that the transition will always occur on Saturday night between Rosh Hashana and Yom Kippur.